Insulator-cable composite locking structure

Abstract

The application discloses an insulator-cable composite locking structure and relates to the technical field of power construction equipment. The insulator-cable composite locking structure comprises a cable, a pair of twisted wire members symmetrically wound outside the cable, a clamping assembly provided outside the connecting part of the cable and the insulator, a pair of clamping sleeves fixed to the top of the connecting part of the cable and the insulator, a clamping edge arranged in the interior of each clamping sleeve, and an extrusion opening symmetrically arranged on the two sides of the bottom of each clamping sleeve. The top of each clamping assembly is provided with a supporting assembly, the supporting assembly comprises a base pre-installed on the top of the clamping sleeve, a vertical rod arranged on the side surface of each base, and a double-plate clamp slidably sleeved with the outer side of the vertical rod. The insulator-cable composite locking structure has the effects of high stability and high structural strength.

Description

Technical Field

[0001] This invention relates to the field of power construction equipment technology, and in particular to a composite locking structure for insulator cables. Background Technology

[0002] To prevent cables from falling off or shifting from insulators due to external forces such as wind and their own weight, to maintain reliable insulation between cables and towers, to prevent short circuits or grounding faults, and to reduce friction and vibration between cables and insulators, cables and insulators are usually bundled together (professionally called "binding").

[0003] An existing Chinese patent application with application number 201911248023.3 discloses a side-binding type fully insulated phase-color pre-twisted wire with a spiral structure. The pre-twisted wire includes an insulator connector and two spiral segments. The insulator connector has a semi-circular structure. The two spiral segments are symmetrically arranged on both sides of the insulator connector, and one end of each spiral segment is connected to both ends of the insulator connector. The two spiral segments have the same structure, the same pitch, and the same inner diameter, and the inner diameter of the spiral segment is smaller than the outer diameter of the insulated wire. Each spiral segment is sleeved on the insulated wire, and the insulator connector is located on one side of the insulated wire. The insulator connector and the insulator wire form an insulator installation space.

[0004] Currently, stranded wires, through a pre-prepared spiral structure, allow the wires to be wound around the cable surface and fixed to the top of the insulator. This binding method is advantageous due to its low cost, ease of operation, and ability to improve the structural strength of the winding point between the stranded wire and the cable, preventing fatigue caused by cable swaying and thus reducing cable lifespan. However, during long-term use, frequent cable swaying due to external factors can cause the stranded wires to loosen, leading to loosening of the connection between the cable and the insulator, thus affecting the overall binding effect. While there are many existing insulator binding and fixing structures, such as the fixing hardware disclosed in CN112768156B, which is a common fixing method, it offers strong structural stability but a small fixing area. Long-term cable swaying can cause localized fatigue, leading to insulation layer cracking and core breakage. Therefore, the problem we need to solve is how to effectively combine stranded wires and fixing hardware to ensure cable reinforcement stability while reducing localized fatigue and extending service life. Summary of the Invention

[0005] This invention discloses a composite locking structure for insulator cables, which aims to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A composite locking structure for insulator cables includes a cable with a pair of twisted wires symmetrically wound around its outer side. The twisted wires press the cable onto the top of an insulator. A locking assembly is sleeved on the outer side of the connection between the cable and the insulator. The locking assembly includes a pair of sleeves that are sleeved and fixed to the top of the connection between the cable and the insulator. Each sleeve has a locking edge inside, which engages with the top outer side of the insulator. Each sleeve has symmetrical compression openings on both sides of its bottom.

[0008] Each of the locking components is provided with a support component on its top. The support component includes a base prefabricated and installed on the top of the sleeve. Each base is provided with a vertical rod on its side. The outer side of the vertical rod is provided with a threaded groove, and a nut is threadedly connected through the threaded groove. A double-plate clamp is slidably sleeved on the outer side of the vertical rod. The double-plate clamp clamps and contacts both sides of the twisted wire.

[0009] The engaging assembly, in conjunction with the supporting assembly, provides different angles of pressing force to the stranded wire, thereby improving the connection strength between the cable and the insulator.

[0010] By adding a locking assembly and a support assembly to the existing cable and insulator binding wire fixing technology, this technical solution still requires prior binding of the stranded wires at the cable and insulator connection point. On this basis, the locking assembly presses down on the stranded wires and clamps them to the outside of the insulator. By pressing down on the insulator and providing pre-tightening force to the stranded wires, it sequentially achieves multiple functions, including fixing the insulator and cable with the stranded wires, fixing the insulator and cable with the locking assembly, and bidirectionally pressing down on the stranded wires and increasing the reinforcement strength of the stranded wires to the insulator, thereby significantly improving the connection stability of the insulator and cable. Simultaneously, the support assembly located at the top of the locking assembly can generate outward compressive force on both ends of the stranded wires and reinforce the locking assembly with a reverse thrust, sequentially achieving multiple functions such as tightening the stranded wires, increasing the tensile force of the stranded wires, and increasing the pressing strength of the locking assembly on the insulator and cable, thereby significantly improving the stability and structural strength of the traditional connection method.

[0011] In a preferred embodiment, each of the extrusion ports has a through opening on its side, and the end of the twisted wire slides into the interior of the extrusion port through the through opening and is subjected to lateral extrusion by the extrusion port.

[0012] By adding a clamping structure with a built-in compression port to the existing cable and insulator binding wire fixing technology, the two ends of the stranded wire are first inserted into the compression port after the stranded wire is installed. Then, the clamping port is installed on the top of the insulator and the cable. After that, the compression port will exert a longitudinal downward pressure on the stranded wire, and at the same time, the compression port will exert a central lateral clamping force on both sides of the stranded wire, thereby fixing the stranded wire, insulator, cable and clamping port.

[0013] In a preferred embodiment, a spring is also fitted onto the outer side of the upright, the spring compressing the double-plate clamp, causing the double-plate clamp to be compressed and limited to the side of the nut.

[0014] By further adding a double-plate clamp structure that slides onto the outside of the pole on the basis of the ferrule, after the worker completes the installation of the ferrule, the double-plate clamp is clamped and fixed to the outside of the stranded wire at the corresponding end. At the same time, the nut is turned to release the spring and drive the double-plate clamp to push the stranded wire outward, and the reverse thrust is used to strengthen the connection between the ferrule and the insulator, and further improve the preload of the stranded wire.

[0015] In a preferred embodiment, the stranded wire assembly includes a clamp end that is bundled to the outside of the connection between the cable and the insulator. Each end of the clamp end has a stranded wire end. The two stranded wire ends are interlaced and wound around the outside of the cable, providing a preload force to the clamp end. The compression port provides a longitudinal compression force to the clamp end, and the double-plate clamp holds the clamp end to the outside of the clamp end and provides a pushing force along the cable axis.

[0016] Based on existing cable and insulator binding wire fixing technology, a stranded wire component consisting of stranded wire ends and clamp ends is set up. The stranded wire ends with double helix distribution are wrapped around both sides of the cable to provide fixation, while the clamp ends provide support to the ends of the insulator, thereby maintaining the connection stability between the insulator and the cable.

[0017] As can be seen from the above, the composite locking structure for insulator cables provided by the present invention has the following technical effects.

[0018] Firstly, by adding a clamping structure with a built-in compression port to the existing cable and insulator binding wire fixing technology, after the stranded wire is installed, the two ends of the stranded wire are inserted into the compression port through the through-hole, and the clamping port is then installed on the top of the insulator and cable. Afterwards, the compression port will generate longitudinal downward pressure on the stranded wire, and at the same time, the compression port will generate a central lateral clamping force on both sides of the stranded wire, thereby achieving overall pre-tightening of the stranded wire, insulator, cable and clamping port, ensuring overall installation stability. In addition, the stranded wire is spirally wound on the cable surface, improving the structural strength of the cable, preventing local fatigue and increasing the service life of the cable.

[0019] Secondly, by further adding a double-plate clamp structure that slides onto the outside of the pole on the basis of the ferrule, after the worker completes the installation of the ferrule, the double-plate clamp is clamped and fixed to the outside of the stranded wire at the corresponding end. At the same time, the nut is turned to release the spring and drive the double-plate clamp to push the stranded wire outward, and the reverse thrust is used to strengthen the connection strength between the ferrule and the insulator, thereby further improving the preload of the stranded wire, the installation firmness of the ferrule and the insulator, and the connection stability between the cable and the insulator. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure proposed in this invention.

[0021] Figure 2 This is an exploded view of the overall structure proposed in this invention.

[0022] Figure 3 This is a schematic diagram of the stranded wire structure proposed in this invention.

[0023] Figure 4 This is a schematic diagram of the card sleeve structure proposed in this invention.

[0024] Figure 5 This is an exploded view of the snap-fit ​​assembly structure proposed in this invention.

[0025] Figure 6 This is a schematic diagram of the card sleeve structure proposed in this invention.

[0026] Figure 7 This is a top view of the stress state of the stranded wire proposed in this invention (the arrow indicates the direction of the stress on the stranded wire).

[0027] Figure 8 This is a front view of the stress state of the stranded wire proposed in this invention (the arrow indicates the direction of the stress on the stranded wire).

[0028] In the diagram: 1. Cable; 2. Twisted wire assembly; 201. Clamp end; 202. Twisted wire end; 3. Engaging assembly; 301. Sleeve; 302. Clamping edge; 3021. Engaging section; 3022. Empty section; 303. Extrusion port; 304. Through port; 4. Support assembly; 401. Base; 4011. Adapter; 4012. Magnetic card slot; 402. Upright pole; 403. Threaded groove; 404. Nut; 405. Double plate clamp; 4051. Bolt limiter; 4052. Washer; 4053. Card slot; 406. Spring. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0030] The composite locking structure for insulator cables disclosed in this invention is mainly used in scenarios where cables and stranded wires are fixedly connected.

[0031] Reference Figures 1 to 8 A composite locking structure for insulator cables includes a cable 1, with a pair of twisted wires 2 symmetrically wound around the outside of the cable 1. The twisted wires 2 press the cable 1 onto the top of the insulator. A locking assembly 3 is sleeved on the outside of the connection between the cable 1 and the insulator. The locking assembly 3 includes a pair of sleeves 301 that are sleeved and fixed to the top of the connection between the cable 1 and the insulator. Each sleeve 301 has a locking edge 302 inside, which locks onto the top outside of the insulator. Each sleeve 301 has symmetrically opened compression openings 303 on both sides of its bottom.

[0032] Each locking assembly 3 is provided with a support assembly 4 on its top. The support assembly 4 includes a base 401 prefabricated and installed on the top of the sleeve 301. Each base 401 is provided with a vertical rod 402 on its side. The outer side of the vertical rod 402 is provided with a threaded groove 403, and a nut 404 is threadedly connected through the threaded groove 403. A double plate clamp 405 is slidably sleeved on the outer side of the vertical rod 402. The double plate clamp 405 clamps and contacts both sides of the twisted wire 2.

[0033] The clamping assembly 3, in conjunction with the support assembly 4, provides different angles of pressing force to the stranded wire 2, thereby improving the connection strength between the cable 1 and the insulator.

[0034] In this embodiment: The worker holds a stranded wire 2 and simultaneously loops the stranded wire 2 onto the neck of the insulator, thereby initially pressing the cable 1 to the top of the insulator (the structure of the stranded wire 2 is as follows). Figure 3 As shown, the status after installation is as follows Figure 2 As shown in the figure), the other end of the twisted wire 2 is spirally sleeved onto the side of the cable 1. Then, the worker holds another twisted wire 2 and, following the same procedure, sleeves it onto the other side of the insulator, completing the initial fixation of the insulator and cable 1. At this point, the worker holds a single locking assembly 3 and installs it on top of the insulator, while simultaneously pressing the twisted wire 2 into the locking assembly 3 from the bottom. Then, the worker rotates the support assembly 4, placing it on the outside of the cable 1 and pressing it into contact with the twisted wire 2. Similarly, the installation of the other locking assembly 3 and support assembly 4 is completed. The specific state is shown in the attached figure. Figure 1 As shown, the insulator and cable 1 are fixed.

[0035] Reference Figures 1 to 2 , Figure 4 , Figures 6 to 8In a preferred embodiment, each extrusion port 303 has a through-hole 304 on its side. The end of the twisted wire 2 slides into the interior of the extrusion port 303 through the through-hole 304 and is subjected to lateral and longitudinal extrusion by the extrusion port 303.

[0036] After the worker installs the stranded wire component 2 and completes the initial installation of the insulator and cable 1, the worker holds a single clamping sleeve 301 and pinches both sides of the stranded wire component 2, causing the sides of the stranded wire component 2 to converge towards the center. This allows the stranded wire component 2 to slide into the through-hole 304 and into the compression port 303. After installing the clamping sleeve 301 onto the top of the insulator, the worker releases the clamping sleeve 301, allowing it to elastically return to its original position and engage inside the compression port 303. This completes the installation of the single clamping sleeve 301. At this point, the clamping sleeve 301 exerts a longitudinal downward pressure on the stranded wire component 2 through the compression port 303, as shown in the attached figure. Figure 8 As shown; simultaneously, the through-hole 304 will also generate a centering compressive force on the stranded wire 2, the specific state of which is shown in the attached figure. Figure 7 As shown.

[0037] The clamping edge 302 separates the upper part of the inner wall of the sleeve 301 into a clamping interval 3021, and the top of the insulator is clamped inside the clamping interval 3021 to fix the insulator. The clamping edge 302 separates the lower part of the inner wall of the sleeve 301 into an empty interval 3022, and the clamping end 201 is distributed inside the empty interval 3022.

[0038] Reference Figures 1 to 2 , Figures 4 to 6 , Figure 8 In a preferred embodiment, the double-plate clamp 405 is clamped on the outside of the clamp end 201 and provides a pushing force along the axial direction of the cable 1. A spring 406 is also sleeved on the outside of the upright 402. The spring 406 compresses the double-plate clamp 405, causing the double-plate clamp 405 to be compressed and limited to the side of the nut 404.

[0039] After installing the clamp 301, the worker rotates the upright 402, causing it to lift the double-plate clamp 405 onto the top of the cable 1. Simultaneously, the worker presses down on the double-plate clamp 405, causing it to engage and clamp the two sides of the stranded wire 2. The specific state is shown in the attached figure. Figure 1 As shown; at this time, the worker rotates the nut 404, causing the nut 404 to move along the threaded groove 403, causing the loosened spring 406 to squeeze and push the double plate clamp 405, thereby causing the double plate clamp 405 to generate a pushing force on the stranded wire 2 along the axial direction of the cable 1. This process can not only increase the preload of the stranded wire 2, but also increase the installation tightness between the ferrule 301 and the insulator, ensuring the overall stability.

[0040] The base 401 has an adapter 4011 rotatably mounted inside, and the end of the upright 402 is inserted and fixed inside the adapter 4011. The bottom of the base 401 has a magnetic slot 4012, and the end of the rotating upright 402 is attracted and fixed inside the magnetic slot 4012, which facilitates the construction operation of workers.

[0041] Specifically, the double-plate clamp 405 has slots 4053 at both ends. Two bolt limiting members 4051 are threaded inside the slots 4053. Several pairs of washers 4052 are also fixedly installed inside the double-plate clamp 405. The inwardly rotating bolt limiting members 4051 cause the washers 4052 to press against the outside of the clamp end 201. After the worker engages the slots 4053 of the double-plate clamp 405 with the outside of the clamp end 201, they simultaneously rotate the bolt limiting members 4051, causing them to press and push the washers 4052, clamping the washers 4052 against the outside of the stranded wire 2, thus clamping the stranded wire 2. It is worth noting that there is a certain gap between the clamp end 201 and the cable 1 to facilitate the engagement of the slots 4053 of the double-plate clamp 405 with the clamp end 201 (e.g., ...). Figure 7 (As shown).

[0042] Reference Figures 1 to 3 , Figures 7 to 8 In a preferred embodiment, the twisted wire component 2 includes a clamp end 201 that is bundled to the outside of the connection between the cable 1 and the insulator. Each end of the clamp end 201 has a twisted wire end 202. The two twisted wire ends 202 are wrapped around the outside of the cable 1 in an alternating manner, providing a pre-tightening force to the clamp end 201 and increasing the friction between the clamp end 201 and the cable 1 to prevent the twisted wire component 2 from falling off. Since the horizontal height of the compression port 303 is lower than the horizontal height of the twisted wire ends 202, the clamp 301 after installation will provide a longitudinal downward compression force to the clamp end 201, the twisted wire ends 202 and the cable 1 through the compression port 303, thereby increasing the tension of the twisted wire component 2 and simultaneously improving the installation stability of the cable 1 and the insulator.

[0043] Working principle: In use, the worker holds a stranded wire piece 2, and attaches the clamp end 201 of the stranded wire piece 2 to the neck of the insulator. The stranded end 202 of the stranded wire piece 2 is then spirally attached to the side of the cable 1, initially pressing the cable 1 against the top of the insulator. The worker then holds another stranded wire piece 2 and attaches it to the other side of the insulator following the same procedure, completing the initial fixation of the insulator and cable 1. At this point, the worker holds a single clamp 301 and pinches both sides of the clamp end 201 of the stranded wire piece 2, causing the clamp end 201 to converge towards the center, thus securing the clamp end 202... 01 can pass through the opening 304. Simultaneously, the worker engages the clamp 301 on the top of the insulator, allowing the clamp end 201 to slide into the opening 304. Then, the worker releases the clamp end 201, allowing it to elastically reset and engage inside the compression port 303, completing the installation of a single clamp 301. Because the horizontal height of the compression port 303 is lower than the height of the stranded wire end 202 and the cable 1, the clamp 301 exerts longitudinal downward pressure on the stranded wire 2 through the compression port 303, increasing the preload of the stranded wire 2. The specific details are shown in the attached figure. Figure 8 As shown; simultaneously, the through-hole 304 will also generate a centering compressive force on the stranded wire 2, the specific state of which is shown in the attached figure. Figure 7 As shown; then the worker rotates the upright 402, causing the upright 402 to move the double-plate clamp 405 to rest on top of the cable 1, and at the same time presses down on the double-plate clamp 405, causing the slot 4053 of the double-plate clamp 405 to engage and clamp the outside of the clamp end 201 of the stranded wire 2, as shown in the attached figure. Figure 1 As shown; at this time, the worker rotates the nut 404, causing the nut 404 to move along the thread groove 403, causing the loosened spring 406 to squeeze and push the double plate clamp 405, thereby causing the double plate clamp 405 to generate a pushing force along the axial direction of the cable 1 on the clamp end 201 of the twisted wire 2, further increasing the pre-tightening force of the twisted wire 2, and also increasing the installation tightness between the clamp 301 and the insulator. Finally, the installation of the other support component 4 and the clamping component 3 can be completed in the same way according to the above process. By combining the twisted wire 2 with the clamping component 3, the clamping component 3 can improve the installation stability between the twisted wire 2 and the cable 1, so that the twisted wire 2 is stably wound on the surface of the cable 1, increasing the contact area and structural strength with the cable 1. During the shaking of the cable 1, the contact position between the cable 1 and the twist end 202 effectively shares the stress generated when the cable 1 shakes, improving the fatigue resistance of the cable 1 and extending the service life of the cable 1.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An insulator-cable combined locking structure comprising a cable (1), characterized in that, A pair of twisted wires (2) are symmetrically wound around the outside of the cable (1). The twisted wires (2) press the cable (1) onto the top of the insulator. A locking assembly (3) is sleeved on the outside of the connection between the cable (1) and the insulator. The locking assembly (3) includes a pair of sleeves (301) that are sleeved and fixed to the top of the connection between the cable (1) and the insulator. Each sleeve (301) has a locking edge (302) inside. The locking edge (302) is locked on the top outside of the insulator. Each sleeve (301) has a compression port (303) symmetrically opened on both sides of its bottom. Each compression port (303) has a through opening (304) on its side. The end of the twisted wire (2) slides into the inside of the compression port (303) through the through opening (304) and is subjected to the lateral compression and longitudinal compression of the compression port (303). Each of the locking components (3) is provided with a support component (4) at its top. The support component (4) includes a base (401) prefabricated and installed on the top of the sleeve (301). Each base (401) is provided with a vertical rod (402) on its side. The outer side of the vertical rod (402) is provided with a threaded groove (403), and a nut (404) is threadedly connected through the threaded groove (403). A double plate clamp (405) is slidably sleeved on the outer side of the vertical rod (402). The double plate clamp (405) clamps and contacts both sides of the twisted wire (2). A spring (406) is also sleeved on the outside of the upright (402). The spring (406) presses the double plate clamp (405), causing the double plate clamp (405) to be pressed and limited to the side of the nut (404). The twisted wire component (2) includes a clamp end (201) that is tied to the outside of the connection between the cable (1) and the insulator. Each end of the clamp end (201) is provided with a twisted wire end (202). The two twisted wire ends (202) are interlaced and wrapped around the outside of the cable (1) and provide a pre-tightening force to the clamp end (201). The horizontal height of the extrusion port (303) is lower than the horizontal height of the twisted wire end (202), thereby providing a longitudinal extrusion force to the clamp end (201), the twisted wire end (202) and the cable (1). The double plate clamp (405) is clamped on the outside of the clamp end (201) and provides a pushing force along the axial direction of the cable (1).

2. The composite locking structure of an insulator and a cable according to claim 1, wherein The locking edge (302) divides the upper part of the inner wall of the sleeve (301) into a locking interval (3021), and the top of the insulator is locked inside the locking interval (3021).

3. The composite locking structure of an insulator and a cable according to claim 2, wherein The edge (302) divides the lower part of the inner wall of the sleeve (301) into an empty section (3022), and the clamp end (201) is distributed inside the empty section (3022).

4. The composite locking structure of an insulator and a cable according to claim 1, wherein The base (401) has an adapter (4011) rotatably mounted inside, and the end of the upright (402) is inserted and fixed inside the adapter (4011).

5. The composite locking structure of an insulator and a cable according to claim 1, wherein The bottom of the base (401) is provided with a magnetic card slot (4012), and the end of the rotating upright (402) is attracted to the inside of the magnetic card slot (4012).

6. The composite cable and insulator locking structure of claim 1, wherein The double-plate clamp (405) has slots (4053) at both ends, and two bolt limiters (4051) are threaded inside the slots (4053).

7. The composite cable and insulator locking structure of claim 6, wherein The double-plate clamp (405) also has several pairs of gaskets (4052) fixedly installed inside. The internally rotated bolt limiter (4051) causes the gaskets (4052) to be squeezed and adhered to the outside of the clamp end (201).

Images